diff --git a/library/RSL_Types.ttcn b/library/RSL_Types.ttcn
index 7f37720..588dc4b 100644
--- a/library/RSL_Types.ttcn
+++ b/library/RSL_Types.ttcn
@@ -1476,6 +1476,15 @@
 			t_RSL_IE(RSL_IE_CHAN_NR, RSL_IE_Body:{chan_nr := chan_nr})
 		}
 	}
+	template RSL_Message tr_RSL_HANDO_DET(template RslChannelNr chan_nr,
+					      template uint8_t acc_delay := ?) := {
+		msg_disc := tr_RSL_MsgDisc(RSL_MDISC_DCHAN, false),
+		msg_type := RSL_MT_HANDO_DET,
+		ies := {
+			tr_RSL_IE(RSL_IE_Body:{chan_nr := chan_nr}),
+			tr_RSL_IE(RSL_IE_Body:{access_delay := acc_delay})
+		}
+	}
 
 
 	/* COMMON CHANNEL MANAGEMENT MESSAGES */